OpenCloudOS-Kernel/arch/mips/kernel/asm-offsets.c

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/*
* asm-offsets.c: Calculate pt_regs and task_struct offsets.
*
* Copyright (C) 1996 David S. Miller
* Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
*
* Kevin Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc.
*/
#include <linux/compat.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/kbuild.h>
#include <linux/suspend.h>
#include <asm/cpu-info.h>
#include <asm/pm.h>
#include <asm/ptrace.h>
#include <asm/processor.h>
#include <asm/smp-cps.h>
#include <linux/kvm_host.h>
void output_ptreg_defines(void)
{
COMMENT("MIPS pt_regs offsets.");
OFFSET(PT_R0, pt_regs, regs[0]);
OFFSET(PT_R1, pt_regs, regs[1]);
OFFSET(PT_R2, pt_regs, regs[2]);
OFFSET(PT_R3, pt_regs, regs[3]);
OFFSET(PT_R4, pt_regs, regs[4]);
OFFSET(PT_R5, pt_regs, regs[5]);
OFFSET(PT_R6, pt_regs, regs[6]);
OFFSET(PT_R7, pt_regs, regs[7]);
OFFSET(PT_R8, pt_regs, regs[8]);
OFFSET(PT_R9, pt_regs, regs[9]);
OFFSET(PT_R10, pt_regs, regs[10]);
OFFSET(PT_R11, pt_regs, regs[11]);
OFFSET(PT_R12, pt_regs, regs[12]);
OFFSET(PT_R13, pt_regs, regs[13]);
OFFSET(PT_R14, pt_regs, regs[14]);
OFFSET(PT_R15, pt_regs, regs[15]);
OFFSET(PT_R16, pt_regs, regs[16]);
OFFSET(PT_R17, pt_regs, regs[17]);
OFFSET(PT_R18, pt_regs, regs[18]);
OFFSET(PT_R19, pt_regs, regs[19]);
OFFSET(PT_R20, pt_regs, regs[20]);
OFFSET(PT_R21, pt_regs, regs[21]);
OFFSET(PT_R22, pt_regs, regs[22]);
OFFSET(PT_R23, pt_regs, regs[23]);
OFFSET(PT_R24, pt_regs, regs[24]);
OFFSET(PT_R25, pt_regs, regs[25]);
OFFSET(PT_R26, pt_regs, regs[26]);
OFFSET(PT_R27, pt_regs, regs[27]);
OFFSET(PT_R28, pt_regs, regs[28]);
OFFSET(PT_R29, pt_regs, regs[29]);
OFFSET(PT_R30, pt_regs, regs[30]);
OFFSET(PT_R31, pt_regs, regs[31]);
OFFSET(PT_LO, pt_regs, lo);
OFFSET(PT_HI, pt_regs, hi);
#ifdef CONFIG_CPU_HAS_SMARTMIPS
OFFSET(PT_ACX, pt_regs, acx);
#endif
OFFSET(PT_EPC, pt_regs, cp0_epc);
OFFSET(PT_BVADDR, pt_regs, cp0_badvaddr);
OFFSET(PT_STATUS, pt_regs, cp0_status);
OFFSET(PT_CAUSE, pt_regs, cp0_cause);
#ifdef CONFIG_CPU_CAVIUM_OCTEON
OFFSET(PT_MPL, pt_regs, mpl);
OFFSET(PT_MTP, pt_regs, mtp);
#endif /* CONFIG_CPU_CAVIUM_OCTEON */
DEFINE(PT_SIZE, sizeof(struct pt_regs));
BLANK();
}
void output_task_defines(void)
{
COMMENT("MIPS task_struct offsets.");
OFFSET(TASK_STATE, task_struct, state);
OFFSET(TASK_THREAD_INFO, task_struct, stack);
OFFSET(TASK_FLAGS, task_struct, flags);
OFFSET(TASK_MM, task_struct, mm);
OFFSET(TASK_PID, task_struct, pid);
#if defined(CONFIG_CC_STACKPROTECTOR)
OFFSET(TASK_STACK_CANARY, task_struct, stack_canary);
#endif
DEFINE(TASK_STRUCT_SIZE, sizeof(struct task_struct));
BLANK();
}
void output_thread_info_defines(void)
{
COMMENT("MIPS thread_info offsets.");
OFFSET(TI_TASK, thread_info, task);
OFFSET(TI_FLAGS, thread_info, flags);
OFFSET(TI_TP_VALUE, thread_info, tp_value);
OFFSET(TI_CPU, thread_info, cpu);
OFFSET(TI_PRE_COUNT, thread_info, preempt_count);
OFFSET(TI_ADDR_LIMIT, thread_info, addr_limit);
OFFSET(TI_REGS, thread_info, regs);
DEFINE(_THREAD_SIZE, THREAD_SIZE);
DEFINE(_THREAD_MASK, THREAD_MASK);
DEFINE(_IRQ_STACK_SIZE, IRQ_STACK_SIZE);
MIPS: IRQ Stack: Unwind IRQ stack onto task stack When the separate IRQ stack was introduced, stack unwinding only proceeded as far as the top of the IRQ stack, leading to kernel backtraces being less useful, lacking the trace of what was interrupted. Fix this by providing a means for the kernel to unwind the IRQ stack onto the interrupted task stack. The processor state is saved to the kernel task stack on interrupt. The IRQ_STACK_START macro reserves an unsigned long at the top of the IRQ stack where the interrupted task stack pointer can be saved. After the active stack is switched to the IRQ stack, save the interrupted tasks stack pointer to the reserved location. Fix the stack unwinding code to look for the frame being the top of the IRQ stack and if so get the next frame from the saved location. The existing test does not work with the separate stack since the ra is no longer pointed at ret_from_{irq,exception}. The test to stop unwinding the stack 32 bytes from the top of a stack must be modified to allow unwinding to continue up to the location of the saved task stack pointer when on the IRQ stack. The low / high marks of the stack are set depending on whether the sp is on an irq stack or not. Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: Masanari Iida <standby24x7@gmail.com> Cc: Chris Metcalf <cmetcalf@mellanox.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jason A. Donenfeld <jason@zx2c4.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15788/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2017-03-21 22:52:25 +08:00
DEFINE(_IRQ_STACK_START, IRQ_STACK_START);
BLANK();
}
void output_thread_defines(void)
{
COMMENT("MIPS specific thread_struct offsets.");
OFFSET(THREAD_REG16, task_struct, thread.reg16);
OFFSET(THREAD_REG17, task_struct, thread.reg17);
OFFSET(THREAD_REG18, task_struct, thread.reg18);
OFFSET(THREAD_REG19, task_struct, thread.reg19);
OFFSET(THREAD_REG20, task_struct, thread.reg20);
OFFSET(THREAD_REG21, task_struct, thread.reg21);
OFFSET(THREAD_REG22, task_struct, thread.reg22);
OFFSET(THREAD_REG23, task_struct, thread.reg23);
OFFSET(THREAD_REG29, task_struct, thread.reg29);
OFFSET(THREAD_REG30, task_struct, thread.reg30);
OFFSET(THREAD_REG31, task_struct, thread.reg31);
OFFSET(THREAD_STATUS, task_struct,
thread.cp0_status);
OFFSET(THREAD_FPU, task_struct, thread.fpu);
OFFSET(THREAD_BVADDR, task_struct, \
thread.cp0_badvaddr);
OFFSET(THREAD_BUADDR, task_struct, \
thread.cp0_baduaddr);
OFFSET(THREAD_ECODE, task_struct, \
thread.error_code);
OFFSET(THREAD_TRAPNO, task_struct, thread.trap_nr);
BLANK();
}
void output_thread_fpu_defines(void)
{
OFFSET(THREAD_FPR0, task_struct, thread.fpu.fpr[0]);
OFFSET(THREAD_FPR1, task_struct, thread.fpu.fpr[1]);
OFFSET(THREAD_FPR2, task_struct, thread.fpu.fpr[2]);
OFFSET(THREAD_FPR3, task_struct, thread.fpu.fpr[3]);
OFFSET(THREAD_FPR4, task_struct, thread.fpu.fpr[4]);
OFFSET(THREAD_FPR5, task_struct, thread.fpu.fpr[5]);
OFFSET(THREAD_FPR6, task_struct, thread.fpu.fpr[6]);
OFFSET(THREAD_FPR7, task_struct, thread.fpu.fpr[7]);
OFFSET(THREAD_FPR8, task_struct, thread.fpu.fpr[8]);
OFFSET(THREAD_FPR9, task_struct, thread.fpu.fpr[9]);
OFFSET(THREAD_FPR10, task_struct, thread.fpu.fpr[10]);
OFFSET(THREAD_FPR11, task_struct, thread.fpu.fpr[11]);
OFFSET(THREAD_FPR12, task_struct, thread.fpu.fpr[12]);
OFFSET(THREAD_FPR13, task_struct, thread.fpu.fpr[13]);
OFFSET(THREAD_FPR14, task_struct, thread.fpu.fpr[14]);
OFFSET(THREAD_FPR15, task_struct, thread.fpu.fpr[15]);
OFFSET(THREAD_FPR16, task_struct, thread.fpu.fpr[16]);
OFFSET(THREAD_FPR17, task_struct, thread.fpu.fpr[17]);
OFFSET(THREAD_FPR18, task_struct, thread.fpu.fpr[18]);
OFFSET(THREAD_FPR19, task_struct, thread.fpu.fpr[19]);
OFFSET(THREAD_FPR20, task_struct, thread.fpu.fpr[20]);
OFFSET(THREAD_FPR21, task_struct, thread.fpu.fpr[21]);
OFFSET(THREAD_FPR22, task_struct, thread.fpu.fpr[22]);
OFFSET(THREAD_FPR23, task_struct, thread.fpu.fpr[23]);
OFFSET(THREAD_FPR24, task_struct, thread.fpu.fpr[24]);
OFFSET(THREAD_FPR25, task_struct, thread.fpu.fpr[25]);
OFFSET(THREAD_FPR26, task_struct, thread.fpu.fpr[26]);
OFFSET(THREAD_FPR27, task_struct, thread.fpu.fpr[27]);
OFFSET(THREAD_FPR28, task_struct, thread.fpu.fpr[28]);
OFFSET(THREAD_FPR29, task_struct, thread.fpu.fpr[29]);
OFFSET(THREAD_FPR30, task_struct, thread.fpu.fpr[30]);
OFFSET(THREAD_FPR31, task_struct, thread.fpu.fpr[31]);
OFFSET(THREAD_FCR31, task_struct, thread.fpu.fcr31);
OFFSET(THREAD_MSA_CSR, task_struct, thread.fpu.msacsr);
BLANK();
}
void output_mm_defines(void)
{
COMMENT("Size of struct page");
DEFINE(STRUCT_PAGE_SIZE, sizeof(struct page));
BLANK();
COMMENT("Linux mm_struct offsets.");
OFFSET(MM_USERS, mm_struct, mm_users);
OFFSET(MM_PGD, mm_struct, pgd);
OFFSET(MM_CONTEXT, mm_struct, context);
BLANK();
DEFINE(_PGD_T_SIZE, sizeof(pgd_t));
DEFINE(_PMD_T_SIZE, sizeof(pmd_t));
DEFINE(_PTE_T_SIZE, sizeof(pte_t));
BLANK();
DEFINE(_PGD_T_LOG2, PGD_T_LOG2);
#ifndef __PAGETABLE_PMD_FOLDED
DEFINE(_PMD_T_LOG2, PMD_T_LOG2);
#endif
DEFINE(_PTE_T_LOG2, PTE_T_LOG2);
BLANK();
DEFINE(_PGD_ORDER, PGD_ORDER);
#ifndef __PAGETABLE_PMD_FOLDED
DEFINE(_PMD_ORDER, PMD_ORDER);
#endif
DEFINE(_PTE_ORDER, PTE_ORDER);
BLANK();
DEFINE(_PMD_SHIFT, PMD_SHIFT);
DEFINE(_PGDIR_SHIFT, PGDIR_SHIFT);
BLANK();
DEFINE(_PTRS_PER_PGD, PTRS_PER_PGD);
DEFINE(_PTRS_PER_PMD, PTRS_PER_PMD);
DEFINE(_PTRS_PER_PTE, PTRS_PER_PTE);
BLANK();
DEFINE(_PAGE_SHIFT, PAGE_SHIFT);
DEFINE(_PAGE_SIZE, PAGE_SIZE);
BLANK();
}
#ifdef CONFIG_32BIT
void output_sc_defines(void)
{
COMMENT("Linux sigcontext offsets.");
OFFSET(SC_REGS, sigcontext, sc_regs);
OFFSET(SC_FPREGS, sigcontext, sc_fpregs);
OFFSET(SC_ACX, sigcontext, sc_acx);
OFFSET(SC_MDHI, sigcontext, sc_mdhi);
OFFSET(SC_MDLO, sigcontext, sc_mdlo);
OFFSET(SC_PC, sigcontext, sc_pc);
OFFSET(SC_FPC_CSR, sigcontext, sc_fpc_csr);
OFFSET(SC_FPC_EIR, sigcontext, sc_fpc_eir);
OFFSET(SC_HI1, sigcontext, sc_hi1);
OFFSET(SC_LO1, sigcontext, sc_lo1);
OFFSET(SC_HI2, sigcontext, sc_hi2);
OFFSET(SC_LO2, sigcontext, sc_lo2);
OFFSET(SC_HI3, sigcontext, sc_hi3);
OFFSET(SC_LO3, sigcontext, sc_lo3);
BLANK();
}
#endif
#ifdef CONFIG_64BIT
void output_sc_defines(void)
{
COMMENT("Linux sigcontext offsets.");
OFFSET(SC_REGS, sigcontext, sc_regs);
OFFSET(SC_FPREGS, sigcontext, sc_fpregs);
OFFSET(SC_MDHI, sigcontext, sc_mdhi);
OFFSET(SC_MDLO, sigcontext, sc_mdlo);
OFFSET(SC_PC, sigcontext, sc_pc);
OFFSET(SC_FPC_CSR, sigcontext, sc_fpc_csr);
BLANK();
}
#endif
void output_signal_defined(void)
{
COMMENT("Linux signal numbers.");
DEFINE(_SIGHUP, SIGHUP);
DEFINE(_SIGINT, SIGINT);
DEFINE(_SIGQUIT, SIGQUIT);
DEFINE(_SIGILL, SIGILL);
DEFINE(_SIGTRAP, SIGTRAP);
DEFINE(_SIGIOT, SIGIOT);
DEFINE(_SIGABRT, SIGABRT);
DEFINE(_SIGEMT, SIGEMT);
DEFINE(_SIGFPE, SIGFPE);
DEFINE(_SIGKILL, SIGKILL);
DEFINE(_SIGBUS, SIGBUS);
DEFINE(_SIGSEGV, SIGSEGV);
DEFINE(_SIGSYS, SIGSYS);
DEFINE(_SIGPIPE, SIGPIPE);
DEFINE(_SIGALRM, SIGALRM);
DEFINE(_SIGTERM, SIGTERM);
DEFINE(_SIGUSR1, SIGUSR1);
DEFINE(_SIGUSR2, SIGUSR2);
DEFINE(_SIGCHLD, SIGCHLD);
DEFINE(_SIGPWR, SIGPWR);
DEFINE(_SIGWINCH, SIGWINCH);
DEFINE(_SIGURG, SIGURG);
DEFINE(_SIGIO, SIGIO);
DEFINE(_SIGSTOP, SIGSTOP);
DEFINE(_SIGTSTP, SIGTSTP);
DEFINE(_SIGCONT, SIGCONT);
DEFINE(_SIGTTIN, SIGTTIN);
DEFINE(_SIGTTOU, SIGTTOU);
DEFINE(_SIGVTALRM, SIGVTALRM);
DEFINE(_SIGPROF, SIGPROF);
DEFINE(_SIGXCPU, SIGXCPU);
DEFINE(_SIGXFSZ, SIGXFSZ);
BLANK();
}
#ifdef CONFIG_CPU_CAVIUM_OCTEON
void output_octeon_cop2_state_defines(void)
{
COMMENT("Octeon specific octeon_cop2_state offsets.");
OFFSET(OCTEON_CP2_CRC_IV, octeon_cop2_state, cop2_crc_iv);
OFFSET(OCTEON_CP2_CRC_LENGTH, octeon_cop2_state, cop2_crc_length);
OFFSET(OCTEON_CP2_CRC_POLY, octeon_cop2_state, cop2_crc_poly);
OFFSET(OCTEON_CP2_LLM_DAT, octeon_cop2_state, cop2_llm_dat);
OFFSET(OCTEON_CP2_3DES_IV, octeon_cop2_state, cop2_3des_iv);
OFFSET(OCTEON_CP2_3DES_KEY, octeon_cop2_state, cop2_3des_key);
OFFSET(OCTEON_CP2_3DES_RESULT, octeon_cop2_state, cop2_3des_result);
OFFSET(OCTEON_CP2_AES_INP0, octeon_cop2_state, cop2_aes_inp0);
OFFSET(OCTEON_CP2_AES_IV, octeon_cop2_state, cop2_aes_iv);
OFFSET(OCTEON_CP2_AES_KEY, octeon_cop2_state, cop2_aes_key);
OFFSET(OCTEON_CP2_AES_KEYLEN, octeon_cop2_state, cop2_aes_keylen);
OFFSET(OCTEON_CP2_AES_RESULT, octeon_cop2_state, cop2_aes_result);
OFFSET(OCTEON_CP2_GFM_MULT, octeon_cop2_state, cop2_gfm_mult);
OFFSET(OCTEON_CP2_GFM_POLY, octeon_cop2_state, cop2_gfm_poly);
OFFSET(OCTEON_CP2_GFM_RESULT, octeon_cop2_state, cop2_gfm_result);
OFFSET(OCTEON_CP2_HSH_DATW, octeon_cop2_state, cop2_hsh_datw);
OFFSET(OCTEON_CP2_HSH_IVW, octeon_cop2_state, cop2_hsh_ivw);
OFFSET(OCTEON_CP2_SHA3, octeon_cop2_state, cop2_sha3);
OFFSET(THREAD_CP2, task_struct, thread.cp2);
OFFSET(THREAD_CVMSEG, task_struct, thread.cvmseg.cvmseg);
BLANK();
}
#endif
#ifdef CONFIG_HIBERNATION
void output_pbe_defines(void)
{
COMMENT(" Linux struct pbe offsets. ");
OFFSET(PBE_ADDRESS, pbe, address);
OFFSET(PBE_ORIG_ADDRESS, pbe, orig_address);
OFFSET(PBE_NEXT, pbe, next);
DEFINE(PBE_SIZE, sizeof(struct pbe));
BLANK();
}
#endif
#ifdef CONFIG_CPU_PM
void output_pm_defines(void)
{
COMMENT(" PM offsets. ");
#ifdef CONFIG_EVA
OFFSET(SSS_SEGCTL0, mips_static_suspend_state, segctl[0]);
OFFSET(SSS_SEGCTL1, mips_static_suspend_state, segctl[1]);
OFFSET(SSS_SEGCTL2, mips_static_suspend_state, segctl[2]);
#endif
OFFSET(SSS_SP, mips_static_suspend_state, sp);
BLANK();
}
#endif
void output_kvm_defines(void)
{
COMMENT(" KVM/MIPS Specific offsets. ");
MIPS: KVM: Add base guest FPU support Add base code for supporting FPU in MIPS KVM guests. The FPU cannot yet be enabled in the guest, we're just laying the groundwork. Whether the guest's FPU context is loaded is stored in a bit in the fpu_inuse vcpu member. This allows the FPU to be disabled when the guest disables it, but keeping the FPU context loaded so it doesn't have to be reloaded if the guest re-enables it. An fpu_enabled vcpu member stores whether userland has enabled the FPU capability (which will be wired up in a later patch). New assembly code is added for saving and restoring the FPU context, and for saving/clearing and restoring FCSR (which can itself cause an FP exception depending on the value). The FCSR is restored before returning to the guest if the FPU is already enabled, and a die notifier is registered to catch the possible FP exception and step over the ctc1 instruction. The helper function kvm_lose_fpu() is added to save FPU context and disable the FPU, which is used when saving hardware state before a context switch or KVM exit (the vcpu_get_regs() callback). The helper function kvm_own_fpu() is added to enable the FPU and restore the FPU context if it isn't already loaded, which will be used in a later patch when the guest attempts to use the FPU for the first time and triggers a co-processor unusable exception. The helper function kvm_drop_fpu() is added to discard the FPU context and disable the FPU, which will be used in a later patch when the FPU state will become architecturally UNPREDICTABLE (change of FR mode) to force a reload of [stale] context in the new FR mode. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Gleb Natapov <gleb@kernel.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org
2014-11-18 22:09:12 +08:00
OFFSET(VCPU_FPR0, kvm_vcpu_arch, fpu.fpr[0]);
OFFSET(VCPU_FPR1, kvm_vcpu_arch, fpu.fpr[1]);
OFFSET(VCPU_FPR2, kvm_vcpu_arch, fpu.fpr[2]);
OFFSET(VCPU_FPR3, kvm_vcpu_arch, fpu.fpr[3]);
OFFSET(VCPU_FPR4, kvm_vcpu_arch, fpu.fpr[4]);
OFFSET(VCPU_FPR5, kvm_vcpu_arch, fpu.fpr[5]);
OFFSET(VCPU_FPR6, kvm_vcpu_arch, fpu.fpr[6]);
OFFSET(VCPU_FPR7, kvm_vcpu_arch, fpu.fpr[7]);
OFFSET(VCPU_FPR8, kvm_vcpu_arch, fpu.fpr[8]);
OFFSET(VCPU_FPR9, kvm_vcpu_arch, fpu.fpr[9]);
OFFSET(VCPU_FPR10, kvm_vcpu_arch, fpu.fpr[10]);
OFFSET(VCPU_FPR11, kvm_vcpu_arch, fpu.fpr[11]);
OFFSET(VCPU_FPR12, kvm_vcpu_arch, fpu.fpr[12]);
OFFSET(VCPU_FPR13, kvm_vcpu_arch, fpu.fpr[13]);
OFFSET(VCPU_FPR14, kvm_vcpu_arch, fpu.fpr[14]);
OFFSET(VCPU_FPR15, kvm_vcpu_arch, fpu.fpr[15]);
OFFSET(VCPU_FPR16, kvm_vcpu_arch, fpu.fpr[16]);
OFFSET(VCPU_FPR17, kvm_vcpu_arch, fpu.fpr[17]);
OFFSET(VCPU_FPR18, kvm_vcpu_arch, fpu.fpr[18]);
OFFSET(VCPU_FPR19, kvm_vcpu_arch, fpu.fpr[19]);
OFFSET(VCPU_FPR20, kvm_vcpu_arch, fpu.fpr[20]);
OFFSET(VCPU_FPR21, kvm_vcpu_arch, fpu.fpr[21]);
OFFSET(VCPU_FPR22, kvm_vcpu_arch, fpu.fpr[22]);
OFFSET(VCPU_FPR23, kvm_vcpu_arch, fpu.fpr[23]);
OFFSET(VCPU_FPR24, kvm_vcpu_arch, fpu.fpr[24]);
OFFSET(VCPU_FPR25, kvm_vcpu_arch, fpu.fpr[25]);
OFFSET(VCPU_FPR26, kvm_vcpu_arch, fpu.fpr[26]);
OFFSET(VCPU_FPR27, kvm_vcpu_arch, fpu.fpr[27]);
OFFSET(VCPU_FPR28, kvm_vcpu_arch, fpu.fpr[28]);
OFFSET(VCPU_FPR29, kvm_vcpu_arch, fpu.fpr[29]);
OFFSET(VCPU_FPR30, kvm_vcpu_arch, fpu.fpr[30]);
OFFSET(VCPU_FPR31, kvm_vcpu_arch, fpu.fpr[31]);
OFFSET(VCPU_FCR31, kvm_vcpu_arch, fpu.fcr31);
MIPS: KVM: Add base guest MSA support Add base code for supporting the MIPS SIMD Architecture (MSA) in MIPS KVM guests. MSA cannot yet be enabled in the guest, we're just laying the groundwork. As with the FPU, whether the guest's MSA context is loaded is stored in another bit in the fpu_inuse vcpu member. This allows MSA to be disabled when the guest disables it, but keeping the MSA context loaded so it doesn't have to be reloaded if the guest re-enables it. New assembly code is added for saving and restoring the MSA context, restoring only the upper half of the MSA context (for if the FPU context is already loaded) and for saving/clearing and restoring MSACSR (which can itself cause an MSA FP exception depending on the value). The MSACSR is restored before returning to the guest if MSA is already enabled, and the existing FP exception die notifier is extended to catch the possible MSA FP exception and step over the ctcmsa instruction. The helper function kvm_own_msa() is added to enable MSA and restore the MSA context if it isn't already loaded, which will be used in a later patch when the guest attempts to use MSA for the first time and triggers an MSA disabled exception. The existing FPU helpers are extended to handle MSA. kvm_lose_fpu() saves the full MSA context if it is loaded (which includes the FPU context) and both kvm_lose_fpu() and kvm_drop_fpu() disable MSA. kvm_own_fpu() also needs to lose any MSA context if FR=0, since there would be a risk of getting reserved instruction exceptions if CU1 is enabled and we later try and save the MSA context. We shouldn't usually hit this case since it will be handled when emulating CU1 changes, however there's nothing to stop the guest modifying the Status register directly via the comm page, which will cause this case to get hit. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Gleb Natapov <gleb@kernel.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org
2015-03-05 19:43:36 +08:00
OFFSET(VCPU_MSA_CSR, kvm_vcpu_arch, fpu.msacsr);
MIPS: KVM: Add base guest FPU support Add base code for supporting FPU in MIPS KVM guests. The FPU cannot yet be enabled in the guest, we're just laying the groundwork. Whether the guest's FPU context is loaded is stored in a bit in the fpu_inuse vcpu member. This allows the FPU to be disabled when the guest disables it, but keeping the FPU context loaded so it doesn't have to be reloaded if the guest re-enables it. An fpu_enabled vcpu member stores whether userland has enabled the FPU capability (which will be wired up in a later patch). New assembly code is added for saving and restoring the FPU context, and for saving/clearing and restoring FCSR (which can itself cause an FP exception depending on the value). The FCSR is restored before returning to the guest if the FPU is already enabled, and a die notifier is registered to catch the possible FP exception and step over the ctc1 instruction. The helper function kvm_lose_fpu() is added to save FPU context and disable the FPU, which is used when saving hardware state before a context switch or KVM exit (the vcpu_get_regs() callback). The helper function kvm_own_fpu() is added to enable the FPU and restore the FPU context if it isn't already loaded, which will be used in a later patch when the guest attempts to use the FPU for the first time and triggers a co-processor unusable exception. The helper function kvm_drop_fpu() is added to discard the FPU context and disable the FPU, which will be used in a later patch when the FPU state will become architecturally UNPREDICTABLE (change of FR mode) to force a reload of [stale] context in the new FR mode. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Gleb Natapov <gleb@kernel.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org
2014-11-18 22:09:12 +08:00
BLANK();
}
#ifdef CONFIG_MIPS_CPS
void output_cps_defines(void)
{
COMMENT(" MIPS CPS offsets. ");
MIPS: smp-cps: rework core/VPE initialisation When hotplug and/or a powered down idle state are supported cases will arise where a non-zero VPE must be brought online without VPE 0, and it where multiple VPEs must be onlined simultaneously. This patch prepares for that by: - Splitting struct boot_config into core & VPE boot config structures, allocated one per core or VPE respectively. This allows for multiple VPEs to be onlined simultaneously without clobbering each others configuration. - Indicating which VPEs should be online within a core at any given time using a bitmap. This allows multiple VPEs to be brought online simultaneously and also indicates to VPE 0 whether it should halt after starting any non-zero VPEs that should be online within the core. For example if all VPEs within a core are offlined via hotplug and the user onlines the second VPE within that core: 1) The core will be powered up. 2) VPE 0 will run from the BEV (ie. mips_cps_core_entry) to initialise the core. 3) VPE 0 will start VPE 1 because its bit is set in the cores bitmap. 4) VPE 0 will halt itself because its bit is clear in the cores bitmap. - Moving the core & VPE initialisation to assembly code which does not make any use of the stack. This is because if a non-zero VPE is to be brought online in a powered down core then when VPE 0 of that core runs it may not have a valid stack, and even if it did then it's messy to run through parts of generic kernel code on VPE 0 before starting the correct VPE. Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2014-04-14 19:04:27 +08:00
OFFSET(COREBOOTCFG_VPEMASK, core_boot_config, vpe_mask);
OFFSET(COREBOOTCFG_VPECONFIG, core_boot_config, vpe_config);
DEFINE(COREBOOTCFG_SIZE, sizeof(struct core_boot_config));
OFFSET(VPEBOOTCFG_PC, vpe_boot_config, pc);
OFFSET(VPEBOOTCFG_SP, vpe_boot_config, sp);
OFFSET(VPEBOOTCFG_GP, vpe_boot_config, gp);
DEFINE(VPEBOOTCFG_SIZE, sizeof(struct vpe_boot_config));
}
#endif